How to activate and troubleshoot NFC chip

Android Guides » Android Devices » How to Activate and Troubleshoot NFC Chips

The NFC chip has become almost indispensable in any modern mobile phone: it's used for paying at card readers, validating transport passes, opening smart doors, pairing accessories, or sharing small files on the fly. The problem is that you only remember it when it stops working right in the supermarket queue or when you're going through the subway turnstile.

When NFC fails, it can be due to something as simple as a disabled setting , an overly thick case, or a misconfigured app , but also to system errors or, in the worst-case scenario, a hardware failure. Before resigning yourself to going to a repair shop or buying a new phone, there are several things you can check yourself to restore contactless payments and other NFC functions.

What exactly is the NFC chip and what is it used for in a mobile phone?

NFC (Near Field Communication) is a short-range wireless communication technology , typically with a range of a few centimeters. It works by creating a small electromagnetic field between two compatible devices, quickly and securely. Therefore, it's used for tasks where simply bringing your phone close together is enough.

In current smartphones, both Android and iPhone, NFC allows you to pay with your mobile phone at contactless POS terminals, validate transport tickets, use your mobile phone as a car or house key (home automation, electric cars like Rivian), pair headphones and speakers, share contacts, or connect to a WiFi network through programmed NFC tags.

Although its power consumption is very low, NFC is disabled by default on many phones to save battery . Others turn it off automatically in certain power-saving modes. Therefore, one of the most common errors is simply trying to use NFC when it's turned off or restricted.

It's also important to understand that not all phones include NFC hardware . It's practically mandatory in high-end phones, and more and more budget models are integrating it, but there are still devices without this chip. If your device doesn't have it, no matter how much you search in the settings, you won't find the option and you won't be able to pay with it.

How to find out if your mobile phone has NFC and check that it is activated

Before you rack your brain, the first thing to do is confirm whether your phone actually has an NFC chip . On Android, you can check this in several ways: by reviewing the specifications on the manufacturer's website, on the phone's box, by looking for the "NFC" option within Settings > Connections/Connected Devices, or by using specific apps like NFC Check that detect the hardware and even indicate whether it's compatible with Google Pay/Google Wallet.

In the Xiaomi ecosystem (Xiaomi, Redmi, and POCO), many recent and mid-range models already include NFC. Brands like the Xiaomi 14, 13, 12, Mi 11, Mi 10, several Redmi Note series (10, 11, 12), Redmi 9, 10, and numerous POCO models (X3 NFC, X4 Pro 5G, F3, F4, F5, M3, M4, etc.) come with it as standard. If your model is on one of these lists or NFC is listed in the specifications, you can assume the hardware is integrated and you just need to configure it properly.

On iPhones, it's simpler: all recent iPhones include NFC for Apple Pay, and modern models also support NFC for reading NFC tags in the background. There's little doubt about it: if your iPhone supports Apple Pay, it has NFC.

Once you've confirmed that your phone has an NFC chip, the next step is to verify that it's turned on . On most Android devices, simply pull down the notification shade and look for the NFC icon in the quick settings: if it's disabled, tap it to turn it on. If it's not there, go to Settings and navigate to "Connections," "Connection & sharing," or "Connected devices" until you find the NFC option and enable it from there.

On some Xiaomi devices running MIUI 12.5 or later, the visible NFC switch may disappear because the system handles it more automatically. In these cases, it's usually enough to properly configure Google Wallet or your payment app and ensure that the "Tap to Pay" or "Contactless Payments" option is enabled in the appropriate app.

Typical problems that prevent normal use of NFC

When NFC is acting up, the cause is usually related to configuration, software, or accessories rather than the chip itself. These are the most common problems that recur on Android and iPhone:

One of the simplest reasons is having NFC disabled without realizing it . Many phones turn it off to conserve battery or after restarts and updates. If you try to pay or read a card without enabling it, nothing will happen; you won't even get a clear error message.

Thick cases , metal covers, magnetic mounts, or wallets attached to the phone are another source of problems. These types of accessories can block or distort the signal, especially if they contain metal parts. Sometimes, simply removing the case makes NFC work perfectly again.

It's also very common to misplace the NFC antenna . It's not always in the same spot: on some models it's in the center of the back, on others near the camera, or even further to one side. If you place your phone on the payment terminal in the wrong place, the reader won't detect anything.

System updates, occasional app crashes, or stuck processes can cause NFC-related software to freeze . This is noticeable when everything previously worked perfectly, and after an Android, MIUI, HyperOS, or iOS update, errors begin when paying or reading tags.

Finally, many users mistake NFC failures for problems that actually originate from the payment app, the card, the bank, or the server . If the failure only occurs when paying, but NFC works for reading tags or pairing devices, it's quite likely the source is Google Wallet, Apple Pay, the bank's app, the card settings, or even the account balance.

General steps to activate and fix NFC on Android

Before resorting to formatting or technical service, it's worth following a sort of "checklist" with the most effective actions to recover NFC on Android phones , whether you have a Samsung, Xiaomi, Redmi, POCO, Motorola, etc.

The first, almost obligatory, step is to restart your phone . It might seem silly, but a simple restart clears unresponsive processes, resets system services (including NFC services), and often resolves occasional freezes after a failed payment, an error in Google Wallet, or an app that has stopped working.

Next, double-check that NFC is enabled in the quick settings or Connections menu . Turn it off and then back on to force the module to restart. If you're using MIUI or HyperOS, go to Settings > Connection & sharing > NFC and make sure the option is enabled.

Also check Airplane mode and power saving modes . If Airplane mode is enabled, many phones can affect other radios besides data, Wi-Fi, and Bluetooth, including NFC. Go to Settings > Connections > Airplane mode and turn it off if it's on. Some extreme battery saving modes also disable NFC when the battery gets too low, so it's a good idea to charge your phone and check the power profiles.

If everything else is working, try removing the case, stickers, stands, and any other rear accessories . Bring your phone directly close to the card reader or NFC device, ensuring nothing is in the way. If this resolves the issue, you've identified the problem: you'll need to change your case or remove any metal components.

Specific settings on Xiaomi, Redmi and POCO for NFC payments

On Xiaomi, Redmi, and POCO phones with MIUI or HyperOS, there are a few specific steps when setting up contactless payments . Besides enabling NFC, it's important to choose the correct wallet type and default payment app.

To begin, go to Settings > Connection & sharing > NFC. There you'll see options like "Security element position" or "Secure element." In Spain and most other countries, to pay with Google Wallet it's usually recommended to select " Use HCE (Host Card Emulation) wallet," which allows the system to emulate a card without needing a physical security element.

Next, within the same menu or in Settings > Connection and sharing > Tap and pay / Contactless payments, select your default payment app . Google Wallet (formerly Google Pay) is the usual choice, but you can also choose your bank's app if it offers NFC payments. Make sure that app is up to date and has all the necessary permissions granted.

It's also a good idea to review the permissions in the Xiaomi Security app , especially if MIUI's security has ever asked for permission when using Google Wallet or your banking app. Go to the Security app > Permissions, find Google Wallet or your banking app, and grant it all the necessary permissions (NFC, background execution, and automatic startup if possible).

If you still can't pay after setting everything up, go to Settings > Apps > See all apps, tap the three dots in the top corner, and enable "Show system apps." Look for "NFC system services" or "Tap & pay" (the name may vary). Go to Storage and cache and tap Clear cache and Clear data . Then restart your phone and try again. Do something similar with Google Play Services, which are essential for HCE payments.

Troubleshooting NFC issues related to banks and cards

Often the NFC chip is working perfectly, but the problems only appear when trying to pay . In these cases, the issue usually lies with the card, the bank's app, or compatibility with Google Wallet or Apple Pay.

First, check if your bank is compatible with Google Wallet or Apple Pay . Although the list of compatible institutions has grown considerably, there are still banks and cards that don't support mobile payments on these platforms. In those cases, you won't be able to add the card to Google Wallet or Apple Wallet, no matter how hard you try.

If your bank has its own app with NFC payments, check that the mobile payment feature is properly enabled . Sometimes you need to accept additional terms and conditions or activate the virtual card from a specific menu within the app. If the option doesn't appear, your card type may not be compatible.

Also check more practical aspects: account balance, card expiration date, or if the card is blocked . An expired card, a card with a security block, or one linked to an account with insufficient funds will cause the payment to fail, and sometimes the error message is so generic it seems like an NFC problem. Pay close attention to the warning that appears on the screen when you try to pay.

Another common cause is incorrectly entering card details (expiration date, CVV) when setting it up in the app. If you suspect this, remove the card from Google Wallet, Apple Pay, or your banking app and add it again, checking each digit. If your bank has issued you a new card, don't forget to update it in the app.

We also shouldn't rule out possible temporary problems with the bank's server . Sometimes the issue isn't with your phone or your card, but with the bank's payment platform. If you see connection errors with the bank's app or many people are reporting problems, check websites like DownDetector to see if it's a general service outage.

How to use your mobile phone correctly when paying with NFC

Even if your phone and card are properly configured, improper physical use of NFC when bringing it close to the payment terminal can cause payments to fail repeatedly. There are a few things to keep in mind.

The first thing to do is make sure your phone is turned on and unlocked when you're going to pay. Some banking apps, or even Google Wallet/Apple Pay, require unlocking with a PIN, fingerprint, or facial recognition before authorizing the payment. If you have it locked in your pocket and simply tap it against the payment terminal, it might not detect anything useful.

Additionally, you need to position your phone correctly near the reader . The NFC antenna is usually located at the top or center of the back of the phone, and the card reader's receiver may be in different positions depending on the model. Don't be afraid to gently move your phone over the reader until you feel the vibration or hear the beep indicating a successful reading.

The ideal distance is between 1 and 2 centimeters, but direct contact usually guarantees better results. Keep your phone pressed against the terminal for a few seconds , without removing it as soon as you bring it close, since the operation sometimes takes a little while depending on the network or the type of transaction.

Also keep in mind that not all card readers accept mobile payments . Some businesses haven't yet activated mobile payment support on their POS systems or are using older methods. If it fails after several attempts at different stores, the problem is likely with your mobile phone; if it only happens at one specific terminal, the issue is probably with the card reader.

What to do when NFC fails on iPhone (Apple Pay, tags, and keys)

On iPhone, most NFC-related problems involve Apple Pay, Apple Wallet, or using the phone as a key (for example, for an electric car or a smart door), although NFC tag reading can also be affected.

A typical example is that double-tapping the side button or the Home button no longer opens Apple Pay and simply turns the screen on/off or does nothing useful. This can happen, for example, after an attempt to pay or activate a public charger (like ChargePoint), leaving Apple Wallet stuck displaying messages like "updating cards - Apple Pay will be available when updates are complete" for hours.

If Apple Wallet gets stuck on that message for longer than a reasonable amount of time, there's likely an internal error in the payment system or in card synchronization . In these cases, it's worth trying the following, in order: restart your iPhone, close and reopen Wallet, remove and re-add your credit cards, and check your internet connection and Apple ID.

Another worrying symptom is that the iPhone stops working as a digital key (for example, for your Rivian car) and you can't force an NFC reading through automations like "scan tag" in Shortcuts. When neither cards, keys, nor manual reading work, it's reasonable to wonder if the physical NFC chip has failed.

However, before assuming a hardware failure, it's advisable to rule out configuration problems: check that Apple Pay is active, that the region is compatible, that there are no content and privacy restrictions blocking Wallet, and that the iOS system is updated to the latest available version.

If, despite all this, the iPhone still does not recognize NFC tags, does not respond when brought near compatible payment terminals, and the functions that depend on the chip (keys, cards, passes) do not activate, it is most likely that there is a physical problem with the antenna or the NFC chip , and in this scenario there will not be much more that can be done via software.

Software errors and updates that affect NFC

On many Android devices, especially those with interfaces like MIUI, HyperOS, or similar, after a major update, strange NFC issues can arise : it stops working after updating, the default payment app becomes misconfigured, or the system stops displaying the NFC icon in the quick settings.

The best course of action in these cases is to go to Settings > System > Updates and install any pending patches , as manufacturers often fix NFC bugs in later minor updates. Also, visit the Play Store to update Google Wallet, your banking app, and generally all payment and connectivity apps.

If the problems appeared right after updating and aren't resolved by a restart or subsequent updates, you can try resetting network settings or, if your model allows it, resetting only the connectivity-related preferences (WiFi, Bluetooth, NFC). This won't delete photos or documents, but you will need to reconnect to Wi-Fi networks and potentially repair some devices.

In more extreme cases, when NFC and other system services behave erratically, some users opt to reset their phone to factory settings . On Xiaomi devices, for example, this is done from Settings > About phone > Backup & reset > Erase all data. Before proceeding, back up your photos, videos, chats, and documents, as the process will erase everything.

Once the device is formatted, set up the phone as new (preferably without restoring from a very old backup) and test NFC with a card or tag. If NFC still doesn't respond after the system is installed, the chances of a hardware failure increase significantly.

When to suspect a hardware failure in the NFC chip

NFC chip hardware is generally quite robust, but it's not immune to shocks, humidity, or manufacturing defects. There are some signs that suggest the problem may lie in the physical components rather than the configuration.

If the phone has suffered a hard fall, a blow to the antenna area (usually on the upper back) or has recently gotten wet, and from that moment NFC stops working completely, it is reasonable to suspect a break or damage to the board or antenna.

Another indication is that no NFC function responds: no payments, no tag reading, no quick pairing , and that you have also ruled out all software possibilities: you have restarted, updated, cleared cache and NFC system data, reset network settings, properly configured your payment app and, if you dared, even factory reset.

On iPhone, if Apple Pay and keys stop working and the device is no longer able to recognize NFC tags under any circumstances, and the option to scan tags in shortcuts does not detect anything, the chances of a failure in the NFC controller increase considerably.

In these circumstances, there's little more you can do on your own without opening the device. The wisest course of action is to contact the manufacturer's official technical support or a trusted service center . If your phone is still under warranty and shows no signs of misuse (impacts, moisture damage, internal tampering), the repair may be covered.

If your phone is a few years old and NFC repair is expensive, consider whether it's worth fixing or if you should upgrade your device . If, in addition to NFC issues, you're experiencing other problems (such as a very short battery life, a cracked screen, or poor performance), it might be time for a new phone.

Payment options if your mobile phone doesn't have NFC or it's not working

If your mobile phone doesn't include an NFC chip, or if it has stopped working and you don't want to or can't repair it, there are still ways to continue paying without always taking out the physical card , although with some limitations.

An increasingly popular alternative is to use wearable devices with NFC , such as smartwatches or fitness trackers that integrate payment technologies like Google Pay or Samsung Pay. Many Wear OS smartwatches from brands like Fossil, Huawei, or Garmin, as well as Samsung watches and the latest Xiaomi watches (Xiaomi Watch 2, Watch 2 Pro, Watch S1 Pro, Watch S1, Watch S3), allow you to configure cards and pay by simply tapping the watch against the payment terminal.

These wearables are designed precisely to complement your mobile phone: even if your phone doesn't have NFC or it's damaged, you can use the watch as a payment method without needing to change your smartphone, as long as your bank is compatible with the watch's platform.

In stores that allow it, another option is to use Bizum or payments via your bank app. Instead of tapping your phone on the POS terminal, the store can give you a phone number or identifier to send the payment via Bizum from your bank's app. It's not as instantaneous as tapping your phone on the card reader, but it's a lifesaver if NFC has failed you.

Ultimately, there's always the option of a good old-fashioned physical card , which continues to work via chip or contactless even if your phone's NFC stops working. It's not as convenient, but it ensures you can keep paying until you decide to repair your phone or get a working NFC-enabled device.

Considering all of the above, it is clear that, although an NFC chip failure can be very annoying in daily life, in most cases it can be solved by checking basic settings, cases, payment apps, updates and small details of use, leaving the most drastic measures such as formatting or going to the technical service for last, and always having alternatives such as wearables or Bizum on hand when NFC is not on your side.